I don't have the source but someone told me that Pope
Benedict XVI made the comment about it being permissible
to vote for a pro-abortion candidate for proportional
reason, etc. etc BEFORE he became pope. He wasn't
speaking from 'the chair'. Since becoming pope I've heard
he's verified the 5 non-negotiable issues: abortion,
euthanasia, same-sex marriage, contraception, embryonic
stem cell research.

Answer by Judie Brown on 10/6/2012:

Linda

The wisest piece of advice I have seen written on the subject of a "proportionate
reason" for voting for a pro-abortion politicians, is this from Archbishop Chaput
when he was addressing what a proportionate reason might be:

It’s the kind of reason we will be able to explain, with a clean heart, to the victims
of abortion when we meet them face to face in the next life–which we most
certainly will. If we’re confident that these victims will accept our motives as
something more than an alibi, then we can proceed.